chinese led lights

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Looks as if they use a notebook power supply. If the lights are being under driven you can always get a different power supply or go to radioshack, frys, or order a more powerful power supply online. And either get the right plug or cut and splice the plug to your new power supply.
 
Looks as if they use a notebook power supply. If the lights are being under driven you can always get a different power supply or go to radioshack, frys, or order a more powerful power supply online. And either get the right plug or cut and splice the plug to your new power supply.

Not true. If that power supply drives the leds, and you modify it without knowing how it is connected, how the leds are wired, and the current that needs to be used, it would be an easy way to blow up every led in the fixture.
 
Simon finally gave me my tracking number just now and said it has been sent. Why lie to me and tell me it was sent a few days ago and then only just send it now? I will never buy anything from from twilight again and would not recommend anyone else deal with them either. Its taken them 15 days to finally send my light.

I had no problem with my custom order. Ordered on a Monday, shipped the next Monday, had at my door the following Monday. 2 Weeks from time off order to delivery isn't to bad in my book coming from China.
 
Hey guys interested in a set. What do you guys recommend for a 92 gallon corner tank? I It has a 3ft opening on the top but is a quarter circle. Thanks alot!!
 
I received my PAR meter today and have tested my Nova a4 setup at full power. I originally bought these for my 150g tank but had to sell my equipment due to a pending move. I have now set up my a4 on a 12g nano and thought I might share my PAR numbers with those wondering about the PAR levels.
My A4 has 90deg optics and is setup as follows
dimmer 1 - 24x Royal blue
dimmer 2 - 20x 12000k white and 4x 400nm
The light current sits 8" above the water surface and the sand bed is 18" below the bottom of the light. The following PAR numbers listed are with the light at 100% on both dimmers. This is just to give an idea on how much PAR the a4 puts out. The red numbers are direct center of the tank, the other numbers are on the sides.
photoPAR.jpg


I currently run my lights at 30% in order to keep my PAR around 300 near the top of the rock work.
 
Not true. If that power supply drives the leds, and you modify it without knowing how it is connected, how the leds are wired, and the current that needs to be used, it would be an easy way to blow up every led in the fixture.

All you have to do is connect positive to positive and negative to negative. I have done it before to a couple of DIY leds I had. Nothing went wrong. The power supply uses one tip. It's just the power of the power supply you need to worry about. If their Crees you can push them up to 700ma depends on what Cree they use. Look on the power supply and HTML will tell you the ma that it is. Maybe 600 or 500ma. Then buy a power supply with the same amps But 700ma.

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d120

d120

My d120 on my hex! The hanging isnt perfect but shows off the light pretty well. Sorry the pictures are not better but this light is AWESOME of course i just upgraded from a old halide but this thing is sweet. 30 blue 25 white if anyone was wondering with 90 optics. I got a second one plan is to put both on my 90 gallon upgrade in a few weeks!
 

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Just got my 2 d120 in same layout as cmantis look great still getting everything together for tank will post pics once it's full

Color popping
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All you have to do is connect positive to positive and negative to negative. I have done it before to a couple of DIY leds I had. Nothing went wrong. The power supply uses one tip. It's just the power of the power supply you need to worry about. If their Crees you can push them up to 700ma depends on what Cree they use. Look on the power supply and HTML will tell you the ma that it is. Maybe 600 or 500ma. Then buy a power supply with the same amps But 700ma.

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No, that picture helps though.

It uses 8 driver chips running anywhere from 650-1000mah each, connected to 6 leds per driver chip. Heat is dissipated from the pcb board they are on to the heatsink. The driver chips are preset to whatever current mah they set it to use. The power supply is probably around 5-6 amp, which cut 8 ways is 650 mah. Adding a power supply with more amps would do nothing.

Its a smart design, but I don't feel enough leds are used for its size. The d120 would actually be the stronger light, at half the price.

They also don't dim very smoothly. Check out this other video. The dimming isn't smooth at all.

http://v.youku.com/v_show/id_XNDMwOTM5NDk2.html
 
Here is a picture damsai sent of the 12" 60w Cree model. It's $178 and includes wireless controller. This is the one that I'm getting. They said it's easy to replace the leds, if one fails. I can do it myself. But comes with 2 year warranty. Will report back once I get it.


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I finally got things settled with Lyn. They are going to build me new lights per this layout. I just want to get feedback on the layout and LED colors.

ledlights.jpg


warm white 6500k
royal blue 460nm
green 515nm
red 630nm
violet 400nm(they can't get 420)
moonlights 460nm

Does this look good?
 
what's are the differences between nova a4 and d120? pros/cons?

John, if I'm not mistaken the big difference is looks and a heat sink go to the nova a4. The d120 doesn't use a heatsink or "look" as nice. Other than that I don't know of a difference, Sam actually recommended the d120 to me at first but when the a4'swent on sale I couldn't pass them up
Corey
 
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